Initial report said Somchai Thongchai, a village headmaster, was driving his pickup truck to deliver students to a village school when mikitants hiding by the roadside bushes opened fire with assault rifles.
Four people who included the driver died on the spot.
Authorities were alerted by the gunshots and quickly rushed to the scene.
They sent another seriously injured to Rusor hospital.
More reinforcement arrived and were coming the areas to hunt the fleeing militants believed to mingle with local people near the scene.